Shih-Ying Hsu (NTU); Sheng-Yuan Liu (ASIAA); Tie Liu (SHAO); the ALMASOP collaboration
We report the detection of four new hot corino sources from a survey study of Planck Galactic Cold Clumps in the Orion Molecular Cloud Complex with the Atacama Compact Array (ACA). We have observed abundant complex organic molecules (COMs), primarily methanol but also other oxygen-bearing COMs and the molecule of prebiotic interest NH2CHO, signifying the presence of hot corinos. While our spatial resolution is not sufficient for resolving most of the molecular emission structure, the large linewidth and high rotational temperature of COMs suggest that they likely reside in the hotter and innermost region immediately surrounding the protostar. Hydrocarbons and long carbon-chain molecules such as c-C3H2 and HC3N are also detected in the four sources, likely tracing the outer and cooler molecular envelopes.